'Aa lava' presentation slideshows

Chapter 7 Fires Within: Igneous Activity

552 views • 55 slides

VOLCANIC Magma Types

Chapter 18. VOLCANIC Magma Types. Introduction (1)?. ~ 1,500 active volcanoes on Earth 400 erupted in the last century ~ 50 eruptions per year Most activity concentrated along major plate boundaries Impact risks depend on the types of volcanoes. Introduction (2)?.

625 views • 30 slides

Silicate structures

Silicate structures. Volcano Types. Volcano Types. Pahoehoe Lava. Aa Lava. Lava Tubes. 10-15 my. Cenozoic Volcanism. 5-10 my. 0-5 my. Seven Sisters, San Luis Obispo. Morro rock. Flood Basalts. Modoc Plateau. Short History of the Modoc Plateau.

571 views • 28 slides

Petrology Chapter-2

Petrology Chapter-2. Gautam Sen. Nature of Magma. Atomic Structure of Silicate Melt. Magma Viscosity. Magma Types & their Viscosities. More viscosity. Densities of magmas. Density-Viscosity-Depth. Experimental Crystallization of tholeiitic basalt at 1 atm. Undercooling & nucleation.

448 views • 23 slides

VOLCANOES

VOLCANOES. YEAR 7. 1. VOLCANOES AND PLATE TECTONICS. 1995, Soufriere Volcano in Montserrat (Caribbean). Volcanic pictures A volcano is a weak spot in the crust where molten material, or magma, comes to the surface.

305 views • 17 slides